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      1 /*
      2  * Copyright (C) 2013 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef MediaKeys_h
     27 #define MediaKeys_h
     28 
     29 #include "bindings/v8/ScriptWrappable.h"
     30 #include "core/dom/EventTarget.h"
     31 #include "wtf/OwnPtr.h"
     32 #include "wtf/PassRefPtr.h"
     33 #include "wtf/RefCounted.h"
     34 #include "wtf/Uint8Array.h"
     35 #include "wtf/Vector.h"
     36 #include "wtf/text/WTFString.h"
     37 
     38 namespace WebCore {
     39 
     40 class ContentDecryptionModule;
     41 class MediaKeySession;
     42 class HTMLMediaElement;
     43 class ExceptionState;
     44 
     45 // References are held by JS and HTMLMediaElement.
     46 // The ContentDecryptionModule has the same lifetime as this object.
     47 // Maintains a reference to all MediaKeySessions created to ensure they live as
     48 // long as this object unless explicitly close()'d.
     49 class MediaKeys : public RefCounted<MediaKeys>, public ScriptWrappable {
     50 public:
     51     static PassRefPtr<MediaKeys> create(const String& keySystem, ExceptionState&);
     52     ~MediaKeys();
     53 
     54     PassRefPtr<MediaKeySession> createSession(ScriptExecutionContext*, const String& mimeType, Uint8Array* initData, ExceptionState&);
     55 
     56     const String& keySystem() const { return m_keySystem; }
     57 
     58     void setMediaElement(HTMLMediaElement*);
     59 
     60 protected:
     61     MediaKeys(const String& keySystem, PassOwnPtr<ContentDecryptionModule>);
     62 
     63     Vector<RefPtr<MediaKeySession> > m_sessions;
     64 
     65     HTMLMediaElement* m_mediaElement;
     66     const String m_keySystem;
     67     OwnPtr<ContentDecryptionModule> m_cdm;
     68 };
     69 
     70 }
     71 
     72 #endif // MediaKeys_h
     73